as I did not find my cups printers anymore in firefox and thunderbird I changed USE-flags for GTK+ to +cups (was -cups and printers worked)

upgradet to dt-2.6.1

in between tested git master

got my library.db from backup and somehow back to 2.6.1

–> WHAT HAPPENS is…

I edit a photo, all works fine

try to apply a style as I did somehow on a daily basis (own ones and t3mijinpak)

dt says “will be applied to the picture”

but… nothing happens and also the history stack stays unchanged

I reverted aforementioned changes (GTK+ cups and version, dt 2.6.0) to no avail

Also just now I wanted to try latest git master but I got:
database `library.db’ couldn’t be upgraded from version 17 to 18. aborting

Below is, what I get, when I start darktable from a terminal (could I paste better or do I need to rely on pixls.us’ smartness? Sorry, if I messed up acc. to boards style! oh I could have done “darktable &> errors.log”… ).
Some comments from my side:

my box is a GENTOO (quite fresh, as the mashine is new but dt worked fine for several days)

I am used to GLib-CRITICAL. It is there somehow for ever already

The GtK-WARNING looks to me like something in the GTK+ code, which I can hardly influence

The most weird one is the sqlite3 error. particularly because the path you see there (/home/Datengrab/tmp/portage/), is the install-tmp directory. So shall not be of any interest after installation (actually all file are really gone there)

(darktable:1097): Gtk-WARNING **: 22:02:49.373: Theme parsing error: gtk.css:68:35: The style property GtkButton:child-displacement-x is deprecated and shouldn’t be used anymore. It will be removed in a future version

(darktable:1097): Gtk-WARNING **: 22:02:49.373: Theme parsing error: gtk.css:69:35: The style property GtkButton:child-displacement-y is deprecated and shouldn’t be used anymore. It will be removed in a future version

(darktable:1097): Gtk-WARNING **: 22:02:49.373: Theme parsing error: gtk.css:71:36: The style property GtkCheckMenuItem:indicator-size is deprecated and shouldn’t be used anymore. It will be removed in a future version

(darktable:1097): Gtk-WARNING **: 22:02:49.373: Theme parsing error: gtk.css:76:30: The style property GtkExpander:expander-size is deprecated and shouldn’t be used anymore. It will be removed in a future version
[rawspeed] basic_string::_M_construct null not valid